66122655 has 32 divisors (see below), whose sum is σ = 109651968. Its totient is φ = 34003200.

The previous prime is 66122653. The next prime is 66122689. The reversal of 66122655 is 55622166.

It is a happy number.

It is not a de Polignac number, because 66122655 - 2¹ = 66122653 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66122653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49395 + ... + 50715.

It is an arithmetic number, because the mean of its divisors is an integer number (3426624).

Almost surely, 2^66122655 is an apocalyptic number.

66122655 is a deficient number, since it is larger than the sum of its proper divisors (43529313).

66122655 is a wasteful number, since it uses less digits than its factorization.

66122655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its digits is 21600, while the sum is 33.

The square root of 66122655 is about 8131.5837940711. The cubic root of 66122655 is about 404.3741897156.

The spelling of 66122655 in words is "sixty-six million, one hundred twenty-two thousand, six hundred fifty-five".